t9H METHOD OF OBVIATING, ScC, 



ts. B. In returning Ihe iron wedges, to avoid firaining thet 

 pngular blocks, it is propofed to le^ve a few of them out 

 ibrward and aft, and ilop the fliip up, by laying one iroa 

 wedge on the other, as (liown at Fig. 1, Plate XI. 



To facilitate tiie bufinefs, blocks may be cleared forward, 

 and aft at the fame time, fufHcient to get in place one length 

 of falfe keel. If the falfe keel (liould want repairing, it may 

 be done without any additional lliores, by clearing one block, 

 at a time, and when the keel is repaired in the wake of that 

 block, return the wedges, as above djreded, and clear ,th€^ 

 pext, 8;c. 



Section and Plan, flute XI, Fii^, 2. 



farrsofthc j\, Keclfon. 



legion and p]an* r> /-. i 

 •^^ *^ B. Ceiling. 



^. Floor timber. 



D. Dead or riling wood. 



E. Plank of the bottom. 



F. Keel and falfe keel. 



Q, Angular blocks with a half-inch irop-plate jolted to tbera, 



H. Caft-iron wedges. 



I. Iron plate of three- fourths of an inch thick on the botloi^ 



, of the dock, 



K. Battering-rams, with wheels, and ropes for the hands. 



Jjy. Caft-iron wedges, having received a blow from forward. 



M, Shores under the fliip to fuftain her weight. 



Fig, S, reprefents part of a top-gallant maft fitted with a 

 wedge fid. 4i| 



a. Top-gallant maf^. 



b. Fid, with one horizontal wedge worked on it. 



c. Moveable wedge, with the iron firap and pin over it, tg^ 

 keep it in its fitualion. 



d. TrufTel trees. 



VII. On 



